Process and apparatus for the production of artificial threads by the cupro-ammonium stretch-spinning process



June 3, 1930. wlNKELMANN 1,761,860

PROCESS AND APPARATUS FOR THE PRODUCTION OF ARTIFICIAL THREADS BY THE CUPRO-AMMONIUM STRETCH SPINNING PROCESS Filed Jan. 19, 1928 v FIG. 4

J72 veizfor WWI (14W,

Patented June 3, 1930 UNITED STATES PATENT OFFICE JHIIEIN'Z WINKELMANN, OF BARMEN, GERMANY, ASSIGNOR TO AMERICAN IBE'MBERG CORPORATION, OF NEW YORK, N. Y.

PROCESS AND APPARATUS FOR THE PRODUCTIONOF ARTIFICIAL THREADS BY THE CUPRO-AMMONIUM STRETCH-SPINNING PROCESS Application filed January 19,: 1928, Serial No. 247,845, and in Germany January 20, 1927.

This invention relates .to the production of artificial threads by the cup'ro-ammonium stretch spinning process; and has for its pr1ncipal ob ect to improve the quality of. the threads obtained. The invention. relates more particularly to that part of the process in wh ch the threads are subjected to an acid treatment.

It has been suggested previously to subject artificial threads to an acidtreatment carried out in channel shaped members of stoneware, porcelain and the like. It has also been con noting the threads through a trough containingacid, the walls of the trough being provided with narrow slits through whlch the threads were passed into and out of the trough.

It has now been found that if the threads are passed'through a thread guide and simultaneously subjected to the and treatment, that this has a considerable influence upon the quality of the threads with respect to their grain or structure and textile pro rtles.

Accordin to the present invent1on, therefore, the artlficial threads are assed through one or more thread guides w ile be1n sub-- jected to an acid treatment in troug s or channel-shaped members,-the pos1t1on of the guides being adjustable in the said troughs or members. The guides lift the threads from the bottom of the trough or channel-shaped member. One or more of these thread guides may be employed and they are preferably made of acid resisting material, for example acid resisting steel, and may be made'out of wire or strip material.

"The inventionis illustrated b way of example in the accompanying rawings, m which: I v

Figure 1 shows in lon ltucunal section an acid treatment channel s aped member with a thread guide;

Figure 2 is a plan of Figured;

Figure 3 is a side view ot F gure 1; Figure 4 shows the thread guide to a larger scale.

A thread a is shown as being delivered from a suitable spinni mechanism and passing around a gulde r b to a channelled member suggested to carry-out the acid treatment by c. The"threads are in known manner subjected to an acid treatment'in the channeled member, A thread guide d fits over the walls of the channeled member and .has a central portion which projects into the channeled member and into close proximity with the I bottom thereof in order to lift the thread more or 1cm from the bottom. This depending por- 7 tion is substantially V-shaped, the point-of the V, however, being rounded off. In the construction shown, the thread'guide is shown as being made of wire bent into a shape so that it can be placed accurately in position and'retained firmly over the channelled member. The simple form of thread guide permits its use with acid treatment apparatus already in use and the thread guide may be disposed atany desired position in the apparatus in a perfectly simple manner. This atter feature is of importance as it has been found that the particular position of the thread guide affects the grain or structure of the artlficialthreads, soft or hard artificial threads in fact being obtained as desired according as to whether the thread guide is disroduce'the results which can be 'ob-' were actually being sub'ected to the acid treatment As a matter 0 fact, the slits owing to them threads efore and after the acidtreatment.

The thread guides employed according to the presentinvention can be secured convenientl and firmly to the channelled member and 0 not affect the flow of the acid through the channelled member and. the threads obtained are free from irregularities and are of absolute uniform quality.

What I claim is: I V 1. A process for the production of artificial position only acted as guides for the' v subjectin -mentin said channelled member.

3. A process for the production of artificial threads by the cupro-ammonium stretch spinning process, consisting in conducting the threads through a thread guide adjustablymounted in a channelled member and the said threads simultaneously {)0 an aci treatment in said channelled mem- 4. Apparatus for the production of artificial threads .by the cupro -arnmonium stretch spinning process, comprising an acid treatment channelled member and a thread guide disposed therein lifting the thread from the bottom thereof. 7

5. Apparatus for the production of artificial threads by the cupro-ammonium stretch spinning process, comprising an acid treatment channelled member and at least one thread guide disposed therein lifting the thread from the bottom thereof.

6. Apparatus for the production of artificial threads by the cupro-ammonium stretch spinning process, comprising an acid treatment channelled member and a thread guide adjustably disposed therein lifting the thread from the bottom thereof.

7 Apparatus for the production of artificial threads by the 'cupro-ammonium stretch spinningprocess, comprising an acid treatment channelled member and at least one thread guide .adjustably disposed therein.

lifting the thread from the bottom thereof.-

8. Apparatus for the production of artificial threads by the cupro-ammonium stretch spinning process, comprising an acid treatment channelled member and a thread guide fitting over said member and having a de- DR. HEINZ WINKELMANN.

pendlng V-shaped portion extending into said channelled member. 7

9; An apparatus for the production of artificial thread bythe cupro-ammonium stretch-spinnin process, comprising a channel-shaped acid treatment member and a thread guide adapted to be positioned in said membervand adjustable along its length.

10. An apparatus for the production of artificial thread by the cupro-ammonium stretch-spinning process, comprising a channel-shaped acid treatment member and a thread guide adapted to be positioned in said member and to life the thread from the bottom thereof, said thread guide being adjust- 

